| How to compile perf for Android |
| ========================================= |
| |
| I. Set the Android NDK environment |
| ------------------------------------------------ |
| |
| (a). Use the Android NDK |
| ------------------------------------------------ |
| 1. You need to download and install the Android Native Development Kit (NDK). |
| Set the NDK variable to point to the path where you installed the NDK: |
| export NDK=/path/to/android-ndk |
| |
| 2. Set cross-compiling environment variables for NDK toolchain and sysroot. |
| For arm: |
| export NDK_TOOLCHAIN=${NDK}/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi- |
| export NDK_SYSROOT=${NDK}/platforms/android-9/arch-arm |
| For x86: |
| export NDK_TOOLCHAIN=${NDK}/toolchains/x86-4.6/prebuilt/linux-x86/bin/i686-linux-android- |
| export NDK_SYSROOT=${NDK}/platforms/android-9/arch-x86 |
| |
| This method is not working for Android NDK versions up to Revision 8b. |
| perf uses some bionic enhancements that are not included in these NDK versions. |
| You can use method (b) described below instead. |
| |
| (b). Use the Android source tree |
| ----------------------------------------------- |
| 1. Download the master branch of the Android source tree. |
| Set the environment for the target you want using: |
| source build/envsetup.sh |
| lunch |
| |
| 2. Build your own NDK sysroot to contain latest bionic changes and set the |
| NDK sysroot environment variable. |
| cd ${ANDROID_BUILD_TOP}/ndk |
| For arm: |
| ./build/tools/build-ndk-sysroot.sh --abi=arm |
| export NDK_SYSROOT=${ANDROID_BUILD_TOP}/ndk/build/platforms/android-3/arch-arm |
| For x86: |
| ./build/tools/build-ndk-sysroot.sh --abi=x86 |
| export NDK_SYSROOT=${ANDROID_BUILD_TOP}/ndk/build/platforms/android-3/arch-x86 |
| |
| 3. Set the NDK toolchain environment variable. |
| For arm: |
| export NDK_TOOLCHAIN=${ANDROID_TOOLCHAIN}/arm-linux-androideabi- |
| For x86: |
| export NDK_TOOLCHAIN=${ANDROID_TOOLCHAIN}/i686-linux-android- |
| |
| II. Compile perf for Android |
| ------------------------------------------------ |
| You need to run make with the NDK toolchain and sysroot defined above: |
| For arm: |
| make ARCH=arm CROSS_COMPILE=${NDK_TOOLCHAIN} CFLAGS="--sysroot=${NDK_SYSROOT}" |
| For x86: |
| make ARCH=x86 CROSS_COMPILE=${NDK_TOOLCHAIN} CFLAGS="--sysroot=${NDK_SYSROOT}" |
| |
| III. Install perf |
| ----------------------------------------------- |
| You need to connect to your Android device/emulator using adb. |
| Install perf using: |
| adb push perf /data/perf |
| |
| If you also want to use perf-archive you need busybox tools for Android. |
| For installing perf-archive, you first need to replace #!/bin/bash with #!/system/bin/sh: |
| sed 's/#!\/bin\/bash/#!\/system\/bin\/sh/g' perf-archive >> /tmp/perf-archive |
| chmod +x /tmp/perf-archive |
| adb push /tmp/perf-archive /data/perf-archive |
| |
| IV. Environment settings for running perf |
| ------------------------------------------------ |
| Some perf features need environment variables to run properly. |
| You need to set these before running perf on the target: |
| adb shell |
| # PERF_PAGER=cat |
| |
| IV. Run perf |
| ------------------------------------------------ |
| Run perf on your device/emulator to which you previously connected using adb: |
| # ./data/perf |